How to deal with school friends that are ignoring me?

[just some girl]

They're over doing it on purpose.
And they put indirect message about on twitter

I know they're not my friends anymore if they're acting like this but there's a big group of us, so I'm stil sitting with them at lunch and break. But how do I act without making things awkward

It's so unexpected and does upset me, this week I've been dreading school ...please help

And I know most might say "go make some new friends" but I still have quite a few friends in this group and everyone on our year has pretty much got their own set group